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Oracle Drags Its Feet in the JavaScript Trademark Dispute
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crop-rotate-resize-in-browser
Advanced tools
Library for rotating, cropping, and resizing images within browser
This library exposes a simple API for retrieving, sending, and manipulating images in the browser.
The demo allows the user to select a photo from his or her computer, crop and rotate the image, and upload directly to Google Cloud Storage using the gcs-signed-urls NPM module.
See demo: http://floating-spire-3371.herokuapp.com/
The library is available on bower and npm.
bower install image-manipulation
OR
npm install image-manipulation
You can access via "window.ImageMethods"
A canvas can be changed using the manipulator methods: rotate, resize and crop. One can use the static methods.
var canvas = document.querySelector("canvas");
var resizedCanvas = ImageMethods.resize(canvas, 100, 100);
var rotatedCanvas = ImageMethods.rotate(resizedCanvas, 90);
document.body.append(rotatedCanvas);
or one can also make a manipulator instance and chain these methods.
var canvas = document.querySelector("canvas");
var manipulator = new ImageMethods(canvas);
manipulator.resize(100, 100).rotate(90);
document.body.append(manipulator.canvas);
Grab an image from the DOM and flip it upside down
var img = document.querySelector("img"),
canvas = ImageMethods.getCanvasFromImage(img);
img.src = ImageMethods.rotate(canvas, 180).toDataURL();
Grab an image from an input element (<input type="file" accept="image/*">), create a thumbnail at 200px width and add it to the screen.
document.querySelector("input[type=file]").onchange = function(e) {
ImageMethods.getCanvasFromFile(e.files[0], function(canvas) {
var manipulator = new ImageMethods(canvas);
manipulator.resize(200);
// Add our resized canvas to the screen
document.body.appendChild(manipulator.canvas)
});
};
Download an image from the server, cut it into 2 pieces, and upload the pieces back to the server via xhr2
ImageMethods.getCanvasFromUrl("/path/to/image.jpg", function(canvas, file) {
var manipulator = new ImageMethods(canvas);
var piece1Canvas = ImageMethods.crop(0, 0, canvas.width/2, canvas.height),
piece2Canvas = ImageMethods.crop(canvas.width/2, 0, canvas.width/2, canvas.height),
// Put together FormData for submission
var formData = new FormData();
formData.append("images[]", ImageMethods.toBlob(piece1Canvas), file.name);
formData.append("images[]", ImageMethods.toBlob(piece2Canvas), file.name);
// Post to server
var xhr = new XMLHttpRequest();
xhr.open("POST", "/my/upload-handler", true);
});
// Create an manipulator instance likeso:
var instance = new ImageMethods(canvas)
// The canvas element can be exposed
instance.canvas
// You can convert your instance into a blob
var blob = instance.toBlob();
These methods follow this form except getCanvasFromImage which simply returns a canvas element.
ImageMethods.getOrientationFromFile(file, function(canvas) {
// Get access to the canvas element here
});
FAQs
Library for rotating, cropping, and resizing images within browser
The npm package crop-rotate-resize-in-browser receives a total of 0 weekly downloads. As such, crop-rotate-resize-in-browser popularity was classified as not popular.
We found that crop-rotate-resize-in-browser demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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